Vapor-generating burner



. Jar 13, R. T. HUGO ET AL VAPOR GENERATING- BURNER Filed June 11, 1923 2 Sheets-Sheet 1 Fll 3.'.l.

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R. T. HUGQ ET AL VAPOR GENERATING BURNER 2 Sheets-Sheet 2 Filed June 11, 1923 Trim? :nrnmtrm Patented Jan. 13, 1925.

UNITED STATES PATENT OFFICE.

RENE 'I. HUGO AND FRED G. KLINERT, OF DULUTH, MINNESOTA, ASSIGNORS TO HUGO MANUFACTURING COMPANY, OF WEST DULUTH, MINNESOTA, A CORPORATION OF MINNESOTA.

VAPOR-GENERATING BURNER.

Application filed June 11, 1923. Serial No. 644,538.

To aZZ whom it may concern:

Be it known thatwe, RENE T. HUGO and FRED G, KLINERT, citizens of the United States, and residents of Duluth, in the county of St. Louis and State of Minnesota, have invented a new and useful Improvement in Vapor-Generating Burners, of which the following is a specification.

The invention relates to vapor burners of the general type in which liquid fuel, such as gasoline, is vaporized in a generator which is subjected to the heat of the burner. While the burner may be used for various purposes, it is particularly applicable to portable stoves for campers, street venders and the like, and is so illustrated herein.

The general object of the invention is to improve the construction and consequent operation of burners of the character explained.

Further and more specific objects are to provide a burner which may be easily and quickly primed under all conditions of service, which may be readily cleaned when occasion arises for it, and to the vapor generator of which liquid fuel may be continuously supplied under adequate pressure.

The invention is illustrated in the accompanying drawings of which Fig. 1 is a plan View of the burner arranged in a casing of a portable stove; Fig. 2 an elevation of the burner, the plane of view being indicated by the line II-II, Fig. 1; Fig. 8 a longitudinal sectional view through a fuel supply tank for the burner, the plane of view being indicated by the line III-III, Fig. 1; Fig. 4 a vertical sectional view to enlarged scale of the burner, the plane of view being indicated by the line 1V-IV, Fig. 1; Fig. 5 a horizontal sectional view taken on the line VV, Fig. 4:; Fig. 6 a vertical sectional view taken on the line VI-VI, Fig. 5; and Fig. 7 a perspective view of a combined wick and baffle.

The burner shown in the illustrative embodiment of the invention includes two jets l and 2, and a single vapor generating tube 3 arranged above jet 1 andadapted to be heated by it. The vapor generated in this tube flows into a mixing chamber in which it is mixed with air, and from which it is conducted to the burner jets or to one of them, it being understood that the burner may include as many jets as are desired. Liquid fuel, such as gasoline, is carried by a fuel supply tank 4, preferably under pressure, and flowsifrom this tank through pipes 5 and 6 to a valve casing 7 connected to vapor generatmg tube 3. lVithin casing '7 there is a valve seat 8 adapted to be closed by a valve 9 attached to a stem 10 which is provided with'an operating member 11.

At the outlet end of vapor generating tube 3 there is a mixing chamber 12 to .which said tube is attached by means of a nozzle 13. To remove such carbon or other sediment as may accumulate in the orifice of nozzle 18 and in tube 3, a needle 1 1 is attached to valve stem 10, the arrangement being such that the end of'the needle extends throughthe orifice of the nozzle when valve 9 is closed. A spring or wire 15 may be coiled around needle 14 to facilitate the generation of vapor in'tube 3 and also to assist in cleaning the tube.

The bottom of mixing chamber 12 is provided with an air inlet port 16 through which flow of air to become mixed with the vapor issuing through nozzle 13 may be controlled by a shutter 17 pivoted as at 18. Between mixing chamber 12 and burner jet 1 there is a priming cup 19 for receiving a small quantity of liquid fuel which is ignited to initiate the generation of vapor in tube 3. Provision is made for supplying priming cup 19 with sufiicient liquid to initiate vapor generation without the necessity of handling the liquid. For this purpose the priming cup communicates with the mixingchamber through a port 20, and a baffle 21, adapted to be operated by an arm 22, is pivotally mounted in the mixing chamber so that it may be moved from its lower full line position indicated in Fig 4, to its dotted line position, in the latter of which it causes liquid fuel to pass downwardly into themixing chamber from which it flows through port 20 into the priming cup. For receiving this gasoline a well is formed in the bottom of the mixing cham-' her by its walls and a partition 23 extending upwardly from the bottom of the chamber. The priming cup is provided with a wick for conducting the priming flame close to the generating tube, and with a baffle for preventing the flame from being blown to a side of the tube. Preferably the wick and battle are combined in a single structure. which, as illustrated in Fig. 7, may com prise a wick 25 of asbestos or other suitable lUll material arranged between a perforate metal plate 25 of inverted .U-shape having outstanding supporting flanges at its lower edges. As seen particularly in Figs. 4 and 3, this structure rests upon the bottom of priming cup 19 and extends upwardly to generating tube 3.

Vapor flowing through nozzle 13, mixed with air flowing through port 16, passes into a pipe 26 from which it flows into pipes 27 and 28 connected to burner jets 1 and 2, respectively. Flow to jet 1 is controlled by valve 9 already explained, and flow to jet 2 may be controlled by a valve 29 having a stem 30, the outer end of which is formed to receive an operating key 31.

Each burner jet may be formed of a screen clamped between upper and lower plates and 3% by means of screws 35. Upper plate may be provided with openings covered by a screen, and through which a portion of the combustible mixture of vapor and air may flow, although the main body of the mixture flows through the side of screen 32.

As previously .explained, liquid fuel under pressure flows from tank 4 to the vapor generating tube through pipes 5 and 6. Pipe 5 preferably extends from the central portion of the bottom of the tank, and has its lower or inlet end serrated or otherwise irregularly formed so that its inlet will not be closed by the bottom of the tank. The top of the tank is provided with a combined filling and pressure-applying plug 37, extending downwardly from which there is a short sleeve 38 to prevent the tank from being entirely filled with liquid fuel, it being understood that to apply pressure to the liquid fuel it is necessary to have an air space above the fuel. Pressure may be applied to the fuel by a hand pump, and the pressure to which the fuel is sub jected may be indicated by a pressure gage 39.

V hen the burner in a portable stove of the character shown in the drawings, it may be rigidly attached to the tank by means of upwardly turned straps 40, which when the stove is in use rest upon the upper edge of a side wall 41 of a stove casing which includes a bottom 42, end walls 43, and ll and a hinged lid l5. Generating tube 3 may be rigidly connected at one end to mixing chamber 12 by nozzle 13, and at its other end to valve casing 7, which, in turn, is rigidly attached to burner jet 1 by means of brackets 4L7 and 48. In addition to these connections for uniting the several parts, pipe 6 rigidly connects fuel supply tank 4 to valve casing 7. An important advantage in rigidly connecting the parts together in the manner explained is that the outlet of vapor generating tube 3 is at all. times maintained in such position that the stream of vapor issuing from the tube is properly directed straight into the mixing chamber. In other words, jarring or rough handling of the burner will not result in the stream of vapor being projected against a side wall of the mixing chamber with consequent improper combustion at the burner jets.

The burner and tank together with the vapor generator and other parts attached to the burner form a rigid unitary structure which is movable from the position in which its several parts are indicated in Figs. 1 and 2 to a position in which the entire structure lies wholly within the casing. In the latter position of the parts lid 4-5 of the casing may be closed and the stove readily carried from place to place. hen the unitary burner structure is in the position indicated in Figs. 1 and 2, that is to say when the stove is set up for use, wall 41 of the casing separates the burner jets: from the fuel tank so that the fuel does not become excessively heated by the burner, and valve opera-ting member 11 and key 31 for controlling flow to the burner jets lie outside the end walls 4:3 and ll of the casing so that they may be readily manipulated when the burner is in operation.

In the operation of the burner, assunr.

ing that tank l contains a supply of liquid fuel under pressure, baflle 21 is turned upwardly to its dotted line position of Fig. 1, and valve 9 is opened to permit a small quantity of gasoline to flow through nozzle 13. Thus gasoline is deflected downwardly by the battle and flows through port 20 into priming cup 19. The fuel in the priming cup is then ignited and within a short time, approximately a minute, generation of vapor in tube 3 is initiated. Battle 21 may then be turned downwardly to its full line position to permit the generated vapor to flow directly into mixing chamber 12, from which it flows through pipes 26 and 27 to burner jet 1, where it becomes ignited by the flame on the priming wick or bafile 84, .85. tinned generation of the vapor is effected by the heat of the flame from jet 1. When it is desired to use jet 2 as well as jet 1 valve 29 may be opened and the vapor issuing from jet 2 ignited.

According to the provisions of the pat ent statutes, we have described the principle and operation of our invention together with the construction which we now consider to represent the best embodiment of it. However, we desire to have it understood that, within the scope of the appended claims, the invention may be practiced by other forms of construction than that particularly shown and described.

e claim as our invention:

1. In a vapor-generating burner, the combination of a burner jet, a mixing cham- The further and conher at one side of the jet, a priming cup between said jet and chamber and communicating with the chamber, a fuel-supply and vapor-generating pipe arranged above said jet and cup and terminating in said mixing chamber, and a pivotally mounted baflie in said mixing chamber and provided with an operating member exteriorly thereof for swinging the baffle to alternate positions of deflecting liquid fuel from said pipe downwardly into the priming cup and of permitting free flow of vapor from the pipe into the mixing chamber.

2. In avapor-generating burner, the combination of a burner jet, a mixing chamber at one side of the jet, a priming cup between said jet and chamber and communicating with the chamber, a fuel-supply and vapor-generating pipe arranged above said jet and cup and terminating in said mixing chamber, the bottom of said mixing chamber being provided with a horizontally disposed air inlet, a shutter for controlling flow of air through said inlet, and movable means arranged within the mixing chamber at a side of said inlet for causing liquid fuel to flow from said pipe into said priming cup.

3. In a vapor-generating burner, the combination of a burner jet, a mixing chamber at one side of the jet, a priming cup between said jet and chamber and communicating with the chamber, a fuel-supply and 'apor-generating pipe arranged above said jet and cup and terminating in said mixing chamber, means for causing liquid fuel from said pipe to flow into said priming cup, and a wick extending from the bottom of said cup to said vapor-generating pipe to direct a flame from the priming cup to the generating pipe.

4. In a vapor-generating burner, the combination of a burner jet, a mixing chamber 5. An oil burner having a priming cup,

a burner cap, a generating tube and acon duit conveying gas fromv said generating tube to the burner cap, and a gravity drainage channel connecting the receiving end of the gas conduit with the priming cup and an intercepting plate movable within the said conduit to intercept the discharge from the generating tube.

6. The combination with a gas burner having a burner cap and a priming cup, a generating tube extending over said burner cap and the priming cup, a gas conveying conduit connecting the discharge end of the generating tube with the burner, the receiving end of said conduit having the floor at its receiving end sloping towards the burner cap, a drainage channel connecting the lower end of the receiving end of said conduit with the priming cup, and an intercepting member movable within said gas conveying conduit into the path of a jet discharged i'rom the generating tube.

In testimony whereof, We hereunto sign our names.

FRED G. KLINER-T. RENE T. HUGO. Witnesses:

E. LEGERMAN, MARJORIE J. STEELE. 

